Body Fluids And Circulation Test

Body Fluids And Circulation

This is Body Fluids And Circulation Test-02 for CBSE class 11 Biology.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
The specialised patch of modified heart muscles from where contraction initiates, is/are :
  • A
    Pacesetter of heart
  • B
    Pacemaker of heart
    Correct
  • C
    both SAN and AVN together
  • D
    none of these
2
The statement incorrect about human heart is :
  • A
    It is four chambered.
  • B
    Wall of left ventricle is thickest.
  • C
    It is myogenic.
  • D
    It is derived from endoderm.
    Correct
3
The layer of heart pericardium which checks its overstretching and overfilling as well as also protects heart from mechanical injury is :
  • A
    fibrous pericardium
    Correct
  • B
    parietal pericardium
  • C
    serous pericardium
  • D
    visceral pericardium
4
Which of the following is correctly matched?
  • A
    P wave = atrial relaxation
  • B
    QRS wave = ventricular repolarisation
  • C
    P wave = atrial repolarisation
  • D
    T wave = ventricular relaxation
    Correct
5
Read the following : i. Blood vessels include arteries and veins. Arteries carry blood from heart to body parts and veins bring back blood from body parts to heart. ii. The blood vessel which carry blood from heart to lungs is pulmonary artery and it carries oxygenated blood.
  • A
    Statement ii) is wrong and i) is correct.
    Correct
  • B
    Statement ii) is correct and i) is wrong.
  • C
    both are wrong
  • D
    both are correct
6
Which of the following statements doesn’t hold true for blood clotting cascade? i. Ruptured platelets release thromboplastin. ii. Prothrombinis converted into thrombin in the presence of vitamin K and Na+ions. iii. Fibrinogen is converted into fibrin through enzymatic action of thrombin in the presence of Ca++ions iv. Fibrin makes clot via process of polymerisation.
  • A
    all statements are wrong
  • B
    only statement i) and iv) are wrong
  • C
    only statement iv) is wrong
  • D
    only statement ii) and iii) are wrong
    Correct
7
Read the following : i. The instrument used for recording heart’s electrical events is named electrocardiogram. ii. In any ECG the part of base line between any two deflections is called interval. iii. Abnormality in the working of heart changes wave pattern of ECG.
  • A
    all statements are correct
  • B
    only ii) and iii) are correct
    Correct
  • C
    only iii) is correct
  • D
    only i) and iii) are correct
8
The mass of tissue seen in the left corner of the right atrium close to the atri-ventricular septum is
  • A
    Purkinje fibres
  • B
    Bundle of His
  • C
    SAN
  • D
    AVN
    Correct
9
Look at the following ECGs:
Question 9 figure 1Question 9 figure 2
  • A
    (ii) ECG is abnormal while (i) is a normal ECG
  • B
    both (i) and (ii) represent myocardial infarction
    Correct
  • C
    (i) represents enlargement of atrium and (ii) represents enlargement of ventricles
  • D
    (ii) represents enlargement of atrium and (i) represents enlargement of ventricles
10
Blood pressure is expressed as the ratio of systolic over diastolic pressure. The difference between systolic and diastolic pressure is called pulse pressure. What will be its value for a normal healthy adult?
  • A
    50 mm Hg
  • B
    70 mm Hg
  • C
    40 mm Hg
    Correct
  • D
    30 mm Hg
11
In the human heart : i. The valve between right atrium and right ventricle is tricuspid while valve between left atrium and left ventricle is mitral valve. ii. Openings of the right and the left ventricles into the pulmonary artery and the aorta are guarded by semilunar valves. iii. ‘Lub’ the first sound which is low pitched is caused by the closure of semilunar valves while ‘Dub’ the second sound which is high pitched is caused by the closure of bicuspid and tricuspid valves.
  • A
    only iii) is correct
  • B
    only ii) and iii) are correct
  • C
    only i) and ii) are correct
    Correct
  • D
    only ii) is correct
12
Each cardiac cycle takes 0.8 seconds to occur. Calculate how many cardiac cycles occur in 4 minutes ?
  • A
    400
  • B
    75
  • C
    250
  • D
    300
    Correct
13
In the given ECGs :
Question 13 figure 1Question 13 figure 2
  • A
    the abnormal P wave in both ECGs represent atrial hypertrophy
    Correct
  • B
    the abnormal P wave in both ECGs represent atrial hypotrophy
  • C
    the abnormal P wave in both ECGs represent ventricular hypertrophy
  • D
    the P waves in both ECGs show changes due to rigorous exercise
14
The left atrium receives deoxygenated blood in :
  • A
    humans
  • B
    pigeons
  • C
    all the above
  • D
    lizards
    Correct
15
Read the following statements : i. when the heart is not pumping blood sufficient to meet the need of the body then this state is called as heart attack. ii. when the heart stops beating due to irreversible death of cells then this state is called as heart failure.
  • A
    both are wrong
    Correct
  • B
    Statement i) is wrong and ii) is correct
  • C
    Statement i) is correct and ii) is wrong
  • D
    both are correct